feat(llvm/phi): Phase 277 P1 - fail-fast validation for PHI strict mode
## Summary Implemented fail-fast validation for PHI ordering and value resolution in strict mode. ## Changes ### P1-1: Strict mode for "PHI after terminator" - File: `src/llvm_py/phi_wiring/wiring.py::ensure_phi` - Behavior: `NYASH_LLVM_PHI_STRICT=1` → RuntimeError if PHI created after terminator - Default: Warning only (no regression) ### P1-2: Strict mode for "fallback 0" - File: `src/llvm_py/phi_wiring/wiring.py::wire_incomings` - Behavior: Strict mode forbids silent fallback to 0 (2 locations) - Location 1: Unresolvable incoming value - Location 2: Type coercion failure - Error messages point to next debug file: `llvm_builder.py::_value_at_end_i64` ### P1-3: Connect verify_phi_ordering() to execution path - File: `src/llvm_py/builders/function_lower.py` - Behavior: Verify PHI ordering after all instructions emitted - Debug mode: Shows "✅ All N blocks have correct PHI ordering" - Strict mode: Raises RuntimeError with block list if violations found ## Testing ✅ Test 1: strict=OFF - passes without errors ✅ Test 2: strict=ON - passes without errors (no violations in test fixtures) ✅ Test 3: debug mode - verify_phi_ordering() connected and running ## Scope - LLVM harness (Python) changes only - No new environment variables (uses existing 3 from Phase 277 P2) - No JoinIR/Rust changes (root fix is Phase 279) - Default behavior unchanged (strict mode opt-in) ## Next Steps - Phase 278: Remove deprecated env var support - Phase 279: Root fix - unify "2本のコンパイラ" pipelines 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
@ -528,9 +528,13 @@ pub(crate) fn lower(
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}
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impl MirBuilder {
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/// Phase 254 P1: Pattern 6 (ScanWithInit) implementation
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/// Phase 272 P0.1: Pattern 6 (ScanWithInit) Frag-based implementation
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///
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/// Lowers index_of-style loops to JoinIR using scan_with_init_minimal lowerer.
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/// Lowers index_of-style loops using EdgeCFG Frag construction (replacing JoinIRConversionPipeline).
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///
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/// # P0 Scope
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/// - Forward scan only (step = 1)
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/// - Reverse scan / dynamic needle → fallback to Ok(None)
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///
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/// # Arguments
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///
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@ -547,15 +551,15 @@ impl MirBuilder {
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debug: bool,
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fn_body: Option<&[ASTNode]>,
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) -> Result<Option<ValueId>, String> {
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use crate::mir::join_ir::lowering::join_value_space::JoinValueSpace;
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use crate::mir::join_ir::lowering::JoinInlineBoundaryBuilder;
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use crate::mir::{BinaryOp, CompareOp, ConstValue, EffectMask, Effect, MirInstruction, MirType};
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use crate::mir::ssot::cf_common::insert_phi_at_head_spanned;
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let trace = trace::trace();
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if debug {
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trace.debug(
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"pattern6/lower",
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&format!("Phase 254 P1: ScanWithInit lowering for {}", func_name),
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&format!("Phase 272 P0.1: ScanWithInit Frag lowering for {}", func_name),
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);
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}
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@ -563,6 +567,27 @@ impl MirBuilder {
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let parts = extract_scan_with_init_parts(condition, body, fn_body)?
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.ok_or_else(|| format!("[pattern6] Not a scan-with-init pattern in {}", func_name))?;
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// P0 Scope: Forward scan (step=1) only
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if parts.step_lit != 1 {
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// Reverse scan / dynamic needle: Pattern6 not applicable
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// Return Ok(None) to let other patterns/generic lowering handle this
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if debug {
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trace.debug(
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"pattern6/lower",
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&format!("P0 fallback: step_lit={} (not forward scan)", parts.step_lit),
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);
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}
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return Ok(None);
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}
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if parts.dynamic_needle {
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// Dynamic needle not supported in P0
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if debug {
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trace.debug("pattern6/lower", "P0 fallback: dynamic_needle=true");
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}
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return Ok(None);
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}
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if debug {
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trace.debug(
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"pattern6/lower",
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@ -581,198 +606,189 @@ impl MirBuilder {
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.copied()
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.ok_or_else(|| format!("[pattern6] Variable {} not found", parts.haystack))?;
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let ch_host = self
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let needle_host = self
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.variable_ctx
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.variable_map
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.get(&parts.needle)
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.copied()
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.ok_or_else(|| format!("[pattern6] Variable {} not found", parts.needle))?;
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let i_host = self
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// Step 3: Get initial loop variable value from variable_map (Pattern8 方式)
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let i_init_val = self
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.variable_ctx
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.variable_map
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.get(&parts.loop_var)
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.copied()
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.ok_or_else(|| format!("[pattern6] Variable {} not found", parts.loop_var))?;
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.ok_or_else(|| format!("[pattern6] Loop variable {} not found", parts.loop_var))?;
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if debug {
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trace.debug(
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"pattern6/lower",
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&format!(
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"Host ValueIds: s={:?}, ch={:?}, i={:?}",
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s_host, ch_host, i_host
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"Host ValueIds: s={:?}, needle={:?}, i_init={:?}",
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s_host, needle_host, i_init_val
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),
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);
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}
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// Step 3: Create JoinModule based on scan direction
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let mut join_value_space = JoinValueSpace::new();
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let join_module = match parts.scan_direction {
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ScanDirection::Forward => {
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use crate::mir::join_ir::lowering::scan_with_init_minimal::lower_scan_with_init_minimal;
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// Phase 258 P0: Pass dynamic_needle to forward lowerer
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lower_scan_with_init_minimal(&mut join_value_space, parts.dynamic_needle)
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}
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ScanDirection::Reverse => {
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use crate::mir::join_ir::lowering::scan_with_init_reverse::lower_scan_with_init_reverse;
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// P0: Reverse lowerer does not support dynamic needle yet
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lower_scan_with_init_reverse(&mut join_value_space)
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}
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};
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// Step 4a: Capture preheader block (entry to loop) for PHI input
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let preheader_bb = self.current_block
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.ok_or_else(|| "[pattern6] No current block for loop entry".to_string())?;
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// Phase 255 P2: Build CarrierInfo for loop variable only
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// Step 1: Create CarrierInfo with loop variable (i) only
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// s and ch are now loop_invariants (not carriers)
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use crate::mir::join_ir::lowering::carrier_info::{CarrierInfo, CarrierRole};
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// Step 4b: Allocate PHI destination for loop variable BEFORE generating blocks
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let i_current = self.next_value_id();
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self.type_ctx.value_types.insert(i_current, MirType::Integer);
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let carrier_info = CarrierInfo::with_carriers(
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parts.loop_var.clone(), // loop_var_name: "i"
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i_host, // loop_var_id (LoopState - header PHI + exit PHI)
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vec![], // Empty carriers - only loop_var
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);
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// Step 4c: Allocate BasicBlockIds for 5 blocks
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let header_bb = self.next_block_id();
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let body_bb = self.next_block_id();
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let step_bb = self.next_block_id();
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let after_bb = self.next_block_id();
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let ret_found_bb = self.next_block_id();
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// Phase 255 P2: Create loop_invariants for ch and s
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// CRITICAL: Order MUST match JoinModule loop_step params: [i, needle, haystack]
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// carrier_order is built as: [loop_var] + loop_invariants
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// So loop_invariants order determines param-to-PHI mapping for invariants!
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// Phase 258 P0: In both fixed and dynamic modes, order is [needle, haystack]
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let loop_invariants = vec![
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(parts.needle.clone(), ch_host), // needle (ch or substr) → JoinIR param 1
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(parts.haystack.clone(), s_host), // haystack (s) → JoinIR param 2
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];
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if debug {
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trace.debug(
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"pattern6/lower",
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&format!(
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"Phase 255 P2: CarrierInfo with loop_var only (i: LoopState), {} loop_invariants (s, ch)",
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loop_invariants.len()
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),
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);
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// Add Jump from current block to header_bb (to terminate the previous block)
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if let Some(_current) = self.current_block {
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self.emit_instruction(MirInstruction::Jump {
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target: header_bb,
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edge_args: None,
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})?;
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}
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// Phase 256.8.5: Use JoinModule.entry.params as SSOT (no hardcoded ValueIds)
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use super::common::get_entry_function;
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let main_func = get_entry_function(&join_module, "pattern6")?;
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// Build header_bb: len = s.length(), cond_loop = (i < len)
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self.start_new_block(header_bb)?;
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// SSOT: Use actual params allocated by JoinIR lowerer
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let join_inputs = main_func.params.clone();
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// Note: PHI node for i_current will be inserted AFTER all blocks are generated
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// (see Step 7 below, after step_bb generates i_next_val)
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// Step 2: Build host_inputs in same order: [i, ch, s] (alphabetical)
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// CRITICAL: Order must match JoinModule main() params: [i, ch, s] (alphabetical)
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// Phase 255 P0: CarrierInfo sorts carriers alphabetically, so params must match
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let host_inputs = vec![i_host, ch_host, s_host]; // [i, ch, s] alphabetical
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let len_val = self.next_value_id();
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self.emit_instruction(MirInstruction::BoxCall {
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dst: Some(len_val),
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box_val: s_host,
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method: "length".to_string(),
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method_id: None,
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args: vec![],
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effects: EffectMask::PURE.add(Effect::Io),
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})?;
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self.type_ctx.value_types.insert(len_val, MirType::Integer);
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// Verify count consistency (fail-fast)
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if join_inputs.len() != host_inputs.len() {
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return Err(format!(
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"[pattern6] Params count mismatch: join_inputs={}, host_inputs={}",
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join_inputs.len(), host_inputs.len()
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));
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}
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let cond_loop = self.next_value_id();
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self.emit_instruction(MirInstruction::Compare {
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dst: cond_loop,
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lhs: i_current, // Use PHI result, not initial value
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op: CompareOp::Lt,
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rhs: len_val,
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})?;
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self.type_ctx.value_types.insert(cond_loop, MirType::Bool);
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// Step 3: Build exit_bindings manually
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// Phase 255 P2: Only LoopState variables (i) need exit bindings
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// Loop invariants (s, ch) do NOT need exit bindings
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use crate::mir::join_ir::lowering::inline_boundary::LoopExitBinding;
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// Build body_bb: ch = s.substring(i, i+1), cond_match = (ch == needle)
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self.start_new_block(body_bb)?;
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let k_exit_func = join_module.require_function(
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crate::mir::join_ir::lowering::canonical_names::K_EXIT,
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"Pattern 6",
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);
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let join_exit_value_i = k_exit_func
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.params
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.first()
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.copied()
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.expect("k_exit must have parameter for exit value");
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let one_val = self.next_value_id();
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self.emit_instruction(MirInstruction::Const {
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dst: one_val,
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value: ConstValue::Integer(1),
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})?;
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self.type_ctx.value_types.insert(one_val, MirType::Integer);
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let i_exit_binding = LoopExitBinding {
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carrier_name: parts.loop_var.clone(),
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join_exit_value: join_exit_value_i,
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host_slot: i_host,
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role: CarrierRole::LoopState,
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};
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let i_plus_one = self.next_value_id();
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self.emit_instruction(MirInstruction::BinOp {
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dst: i_plus_one,
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lhs: i_current, // Use PHI result, not initial value
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op: BinaryOp::Add,
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rhs: one_val,
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})?;
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self.type_ctx.value_types.insert(i_plus_one, MirType::Integer);
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// Phase 255 P2: Only i (LoopState) in exit_bindings
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// s and ch are loop_invariants, not carriers
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let exit_bindings = vec![i_exit_binding];
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let ch_val = self.next_value_id();
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self.emit_instruction(MirInstruction::BoxCall {
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dst: Some(ch_val),
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box_val: s_host,
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method: "substring".to_string(),
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method_id: None,
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args: vec![i_current, i_plus_one], // Use PHI result, not initial value
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effects: EffectMask::PURE.add(Effect::Io),
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})?;
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self.type_ctx.value_types.insert(ch_val, MirType::String);
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if debug {
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trace.debug(
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"pattern6/lower",
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&format!("Phase 255 P2: Generated {} exit_bindings (i only)", exit_bindings.len()),
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);
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}
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let cond_match = self.next_value_id();
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self.emit_instruction(MirInstruction::Compare {
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dst: cond_match,
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lhs: ch_val,
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op: CompareOp::Eq,
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rhs: needle_host,
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})?;
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self.type_ctx.value_types.insert(cond_match, MirType::Bool);
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// Step 4: Build boundary with carrier_info and loop_invariants
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let boundary = JoinInlineBoundaryBuilder::new()
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.with_inputs(join_inputs, host_inputs)
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.with_loop_invariants(loop_invariants) // Phase 255 P2: Add loop invariants
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.with_exit_bindings(exit_bindings)
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.with_loop_var_name(Some(parts.loop_var.clone()))
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.with_carrier_info(carrier_info.clone()) // ✅ Key: carrier_info for multi-PHI
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.build();
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// Build step_bb: i_next = i + 1
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self.start_new_block(step_bb)?;
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// Step 5: Build PostLoopEarlyReturnPlan for exit PHI usage (Phase 255 P1)
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// This forces the exit PHI value to be used, preventing DCE from eliminating it
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use crate::mir::builder::control_flow::joinir::patterns::policies::post_loop_early_return_plan::PostLoopEarlyReturnPlan;
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use crate::ast::Span;
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let i_next_val = self.next_value_id();
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self.emit_instruction(MirInstruction::BinOp {
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dst: i_next_val,
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lhs: i_current, // Use PHI result, not initial value
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op: BinaryOp::Add,
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rhs: one_val, // Reuse one_val from body_bb
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})?;
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self.type_ctx.value_types.insert(i_next_val, MirType::Integer);
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// Note: Do NOT update variable_map here - PHI will handle SSA renaming
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let post_loop_plan = PostLoopEarlyReturnPlan {
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cond: ASTNode::BinaryOp {
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operator: BinaryOperator::NotEqual,
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left: Box::new(var(&parts.loop_var)), // i
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right: Box::new(ASTNode::Literal {
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value: LiteralValue::Integer(parts.not_found_return_lit), // -1
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span: Span::unknown(),
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}),
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span: Span::unknown(),
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},
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ret_expr: var(&parts.loop_var), // return i
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};
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// Ensure ret_found_bb and after_bb exist (they don't have instructions, but must exist for emit_frag)
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self.ensure_block_exists(ret_found_bb)?;
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self.ensure_block_exists(after_bb)?;
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if debug {
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trace.debug(
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"pattern6/lower",
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"Phase 255 P1: Built PostLoopEarlyReturnPlan (cond: i != -1, ret: i)",
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);
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}
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// Step 7: Insert PHI at head of header_bb - Phase 272 P0.2 Refactoring: use emission/phi.rs
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use crate::mir::builder::emission::phi::insert_loop_phi;
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// Step 6: Execute JoinIRConversionPipeline
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use super::conversion_pipeline::JoinIRConversionPipeline;
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let _ = JoinIRConversionPipeline::execute(
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insert_loop_phi(
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self,
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join_module,
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Some(&boundary),
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"pattern6",
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debug,
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header_bb,
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i_current,
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vec![
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(preheader_bb, i_init_val), // Entry edge: initial value
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(step_bb, i_next_val), // Latch edge: updated value
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],
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"pattern6/header_phi",
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)?;
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// Step 6.5: Emit post-loop early return guard (Phase 255 P1)
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// This prevents exit PHI from being DCE'd by using the value
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use super::pattern2_steps::post_loop_early_return_step_box::PostLoopEarlyReturnStepBox;
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PostLoopEarlyReturnStepBox::maybe_emit(self, Some(&post_loop_plan))?;
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if debug {
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trace.debug(
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"pattern6/lower",
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"Phase 255 P1: Emitted post-loop early return guard (if i != -1 { return i })",
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);
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trace.debug("pattern6/lower", "PHI inserted at header_bb");
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}
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// Note: The post-loop guard ensures exit PHI is used:
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// - k_exit with i (found case)
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// - k_exit with -1 (not found case)
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// The original "return -1" statement after the loop is unreachable
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// and will be optimized away by DCE.
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// Step 8: Call emission entrypoint
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use crate::mir::builder::emission::loop_scan_with_init::emit_scan_with_init_edgecfg;
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// Step 7: Return Void (loops don't produce values)
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let void_val = crate::mir::builder::emission::constant::emit_void(self);
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emit_scan_with_init_edgecfg(
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self,
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header_bb,
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body_bb,
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step_bb,
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after_bb,
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ret_found_bb,
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cond_loop,
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cond_match,
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i_current, // Return value for found case
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)?;
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||||
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if debug {
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trace.debug("pattern6/lower", "Frag emitted successfully");
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}
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// Step 9: Update variable_map to use final loop variable value
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// (This is the value when loop exits normally via i >= len)
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self.variable_ctx.variable_map.insert(parts.loop_var.clone(), i_current);
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// Step 10: Setup after_bb for subsequent AST lowering (return -1)
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// CRITICAL: Use start_new_block() to create actual block, not just set current_block
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self.start_new_block(after_bb)?;
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// Step 11: Return Void (pattern applied successfully)
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use crate::mir::builder::emission::constant::emit_void;
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let void_val = emit_void(self);
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||||
|
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if debug {
|
||||
trace.debug(
|
||||
"pattern6/lower",
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&format!("Pattern 6 complete, returning Void {:?}", void_val),
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||||
&format!("Pattern 6 Frag complete, returning Void {:?}", void_val),
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||||
);
|
||||
}
|
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@ -243,70 +243,30 @@ pub(crate) fn can_lower(
|
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_builder: &MirBuilder,
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ctx: &super::router::LoopPatternContext,
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) -> bool {
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use crate::mir::loop_pattern_detection::LoopPatternKind;
|
||||
|
||||
// Phase 256 P0: Accept Pattern2Break OR Pattern3IfPhi (same as Pattern 6)
|
||||
match ctx.pattern_kind {
|
||||
LoopPatternKind::Pattern2Break | LoopPatternKind::Pattern3IfPhi => {
|
||||
// Continue to structure checks
|
||||
// Phase 272 P0.2: SSOT between detect and extract (follow Pattern6 approach)
|
||||
// Try extraction - if it succeeds, pattern matches
|
||||
match extract_split_scan_parts(ctx.condition, ctx.body, &[]) {
|
||||
Ok(_) => {
|
||||
// Pattern is extractable
|
||||
if ctx.debug {
|
||||
trace::trace().debug(
|
||||
"pattern7/can_lower",
|
||||
"accept: pattern extractable (SSOT verified)",
|
||||
);
|
||||
}
|
||||
true
|
||||
}
|
||||
_ => return false,
|
||||
}
|
||||
|
||||
// Check for if statement with MethodCall in condition
|
||||
let has_if_with_methodcall = ctx.body.iter().any(|stmt| {
|
||||
matches!(stmt, ASTNode::If { condition, .. } if contains_methodcall(condition))
|
||||
});
|
||||
|
||||
if !has_if_with_methodcall {
|
||||
if ctx.debug {
|
||||
trace::trace().debug(
|
||||
"pattern7/can_lower",
|
||||
"reject: no if with MethodCall in condition",
|
||||
);
|
||||
Err(e) => {
|
||||
// Extraction failed - pattern doesn't match
|
||||
if ctx.debug {
|
||||
trace::trace().debug(
|
||||
"pattern7/can_lower",
|
||||
&format!("reject: pattern not extractable - {}", e),
|
||||
);
|
||||
}
|
||||
false
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
// Check for VARIABLE STEP pattern (i = start, where start = i + separator.length())
|
||||
// This distinguishes Pattern 7 from Pattern 6 (which has i = i + 1)
|
||||
let has_variable_step = ctx.body.iter().any(|stmt| {
|
||||
matches!(stmt, ASTNode::If { then_body, .. } if contains_variable_step(then_body))
|
||||
});
|
||||
|
||||
if !has_variable_step {
|
||||
if ctx.debug {
|
||||
trace::trace().debug(
|
||||
"pattern7/can_lower",
|
||||
"reject: no variable step pattern found",
|
||||
);
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
// Check for push() operation in then branch
|
||||
let has_push_operation = ctx.body.iter().any(|stmt| {
|
||||
matches!(stmt, ASTNode::If { then_body, .. } if contains_push(then_body))
|
||||
});
|
||||
|
||||
if !has_push_operation {
|
||||
if ctx.debug {
|
||||
trace::trace().debug(
|
||||
"pattern7/can_lower",
|
||||
"reject: no push() operation in then branch",
|
||||
);
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
if ctx.debug {
|
||||
trace::trace().debug(
|
||||
"pattern7/can_lower",
|
||||
"MATCHED: SplitScan pattern detected",
|
||||
);
|
||||
}
|
||||
|
||||
true
|
||||
}
|
||||
|
||||
/// Check if AST node contains MethodCall
|
||||
@ -356,16 +316,17 @@ pub(crate) fn lower(
|
||||
}
|
||||
|
||||
impl MirBuilder {
|
||||
/// Phase 256 P0: Pattern 7 (SplitScan) implementation
|
||||
/// Phase 272 P0.2: Pattern 7 (SplitScan) Frag implementation
|
||||
///
|
||||
/// Lowers split/tokenization loops to JoinIR using split_scan_minimal lowerer.
|
||||
/// Direct EdgeCFG Frag construction (no JoinIRConversionPipeline).
|
||||
///
|
||||
/// # Architecture
|
||||
///
|
||||
/// - 2 carriers: i (loop index), start (segment start)
|
||||
/// - 3 invariants: s (haystack), sep (separator), result (accumulator)
|
||||
/// - Conditional step via Select (P0 pragmatic approach)
|
||||
/// - Post-loop segment push stays in host AST (k_exit is pure return)
|
||||
/// - 4 PHI nodes: header (i_current, start_current) + step (i_next, start_next)
|
||||
/// - 6 blocks: header, body, then, else, step, after
|
||||
/// - Side effect: result.push(segment) in then_bb
|
||||
/// - Frag: 2 branches (header, body) + 3 wires (then→step, else→step, step→header)
|
||||
pub(crate) fn cf_loop_pattern7_split_scan_impl(
|
||||
&mut self,
|
||||
condition: &ASTNode,
|
||||
@ -374,16 +335,12 @@ impl MirBuilder {
|
||||
debug: bool,
|
||||
fn_body: Option<&[ASTNode]>,
|
||||
) -> Result<Option<crate::mir::ValueId>, String> {
|
||||
use crate::mir::join_ir::lowering::join_value_space::JoinValueSpace;
|
||||
use crate::mir::join_ir::lowering::split_scan_minimal::lower_split_scan_minimal;
|
||||
use crate::mir::join_ir::lowering::JoinInlineBoundaryBuilder;
|
||||
|
||||
let trace = trace::trace();
|
||||
|
||||
if debug {
|
||||
trace.debug(
|
||||
"pattern7/lower",
|
||||
&format!("Phase 256 P0: SplitScan lowering for {}", func_name),
|
||||
&format!("Phase 272 P0.2: SplitScan Frag lowering for {}", func_name),
|
||||
);
|
||||
}
|
||||
|
||||
@ -394,7 +351,8 @@ impl MirBuilder {
|
||||
if debug {
|
||||
trace.debug("pattern7/lower", &format!("extraction failed: {}", e));
|
||||
}
|
||||
return Err(format!("Pattern 7 extraction failed: {}", e));
|
||||
// Pattern not applicable - return Ok(None) to allow fallback
|
||||
return Ok(None);
|
||||
}
|
||||
};
|
||||
|
||||
@ -408,213 +366,289 @@ impl MirBuilder {
|
||||
);
|
||||
}
|
||||
|
||||
// Step 2: Get host ValueIds for all variables
|
||||
let s_host = self
|
||||
.variable_ctx
|
||||
.variable_map
|
||||
.get(&parts.s_var)
|
||||
.copied()
|
||||
.ok_or_else(|| format!("[pattern7] Variable {} not found", parts.s_var))?;
|
||||
|
||||
let sep_host = self
|
||||
.variable_ctx
|
||||
.variable_map
|
||||
.get(&parts.sep_var)
|
||||
.copied()
|
||||
.ok_or_else(|| format!("[pattern7] Variable {} not found", parts.sep_var))?;
|
||||
|
||||
let result_host = self
|
||||
.variable_ctx
|
||||
.variable_map
|
||||
.get(&parts.result_var)
|
||||
.copied()
|
||||
.ok_or_else(|| format!("[pattern7] Variable {} not found", parts.result_var))?;
|
||||
|
||||
let i_host = self
|
||||
.variable_ctx
|
||||
.variable_map
|
||||
.get(&parts.i_var)
|
||||
.copied()
|
||||
.ok_or_else(|| format!("[pattern7] Variable {} not found", parts.i_var))?;
|
||||
|
||||
let start_host = self
|
||||
.variable_ctx
|
||||
.variable_map
|
||||
.get(&parts.start_var)
|
||||
.copied()
|
||||
.ok_or_else(|| format!("[pattern7] Variable {} not found", parts.start_var))?;
|
||||
// Step 3.1: Get host ValueIds from variable_map (Phase 272 P0.2 Refactoring: use require())
|
||||
let i_init_val = self.variable_ctx.require(&parts.i_var, "pattern7")?;
|
||||
let start_init_val = self.variable_ctx.require(&parts.start_var, "pattern7")?;
|
||||
let s_host = self.variable_ctx.require(&parts.s_var, "pattern7")?;
|
||||
let sep_host = self.variable_ctx.require(&parts.sep_var, "pattern7")?;
|
||||
let result_host = self.variable_ctx.require(&parts.result_var, "pattern7")?;
|
||||
|
||||
if debug {
|
||||
trace.debug(
|
||||
"pattern7/lower",
|
||||
&format!(
|
||||
"Host ValueIds: i={:?}, result={:?}, s={:?}, sep={:?}, start={:?}",
|
||||
i_host, result_host, s_host, sep_host, start_host
|
||||
"Host ValueIds: i={:?}, start={:?}, s={:?}, sep={:?}, result={:?}",
|
||||
i_init_val, start_init_val, s_host, sep_host, result_host
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
// Step 3: Create JoinModule
|
||||
let mut join_value_space = JoinValueSpace::new();
|
||||
let join_module = lower_split_scan_minimal(&mut join_value_space);
|
||||
// Step 3.2: Block allocation (6 blocks)
|
||||
let preheader_bb = self.current_block.ok_or("[pattern7] No current block")?;
|
||||
|
||||
// Phase 255 P2: Build CarrierInfo for 2 carriers (i, start)
|
||||
use crate::mir::join_ir::lowering::carrier_info::{CarrierInfo, CarrierVar, CarrierRole};
|
||||
// Allocate PHI destinations BEFORE blocks (Pattern8 style)
|
||||
use crate::mir::MirType;
|
||||
let i_current = self.next_value_id();
|
||||
self.type_ctx.value_types.insert(i_current, MirType::Integer);
|
||||
let start_current = self.next_value_id();
|
||||
self.type_ctx
|
||||
.value_types
|
||||
.insert(start_current, MirType::Integer);
|
||||
let i_next = self.next_value_id();
|
||||
self.type_ctx.value_types.insert(i_next, MirType::Integer);
|
||||
let start_next = self.next_value_id();
|
||||
self.type_ctx
|
||||
.value_types
|
||||
.insert(start_next, MirType::Integer);
|
||||
|
||||
let carrier_info = CarrierInfo::with_carriers(
|
||||
parts.i_var.clone(), // loop_var_name: "i"
|
||||
i_host, // loop_var_id (LoopState)
|
||||
vec![CarrierVar::with_role(
|
||||
parts.start_var.clone(), // second carrier: "start"
|
||||
start_host, // start_id (LoopState)
|
||||
CarrierRole::LoopState,
|
||||
)],
|
||||
);
|
||||
let header_bb = self.next_block_id();
|
||||
let body_bb = self.next_block_id();
|
||||
let then_bb = self.next_block_id();
|
||||
let else_bb = self.next_block_id();
|
||||
let step_bb = self.next_block_id();
|
||||
let after_bb = self.next_block_id();
|
||||
|
||||
// Phase 255 P2: Create loop_invariants for result, s, sep
|
||||
// CRITICAL: Order MUST match JoinModule loop_step params: [i, start, result, s, sep]
|
||||
// carrier_order is built as: [loop_var (i), carriers (start)] + loop_invariants
|
||||
// So loop_invariants order must be [result, s, sep] to match param indices 2, 3, 4!
|
||||
// Phase 256 P1.5: result needs to be in BOTH loop_invariants (for initial value) AND exit_bindings (for return)
|
||||
let loop_invariants = vec![
|
||||
(parts.result_var.clone(), result_host), // result: JoinIR param 2
|
||||
(parts.s_var.clone(), s_host), // s: JoinIR param 3 (haystack, read-only)
|
||||
(parts.sep_var.clone(), sep_host), // sep: JoinIR param 4 (separator, read-only)
|
||||
];
|
||||
// Terminate preheader
|
||||
use crate::mir::MirInstruction;
|
||||
self.emit_instruction(MirInstruction::Jump {
|
||||
target: header_bb,
|
||||
edge_args: None,
|
||||
})?;
|
||||
|
||||
if debug {
|
||||
trace.debug(
|
||||
"pattern7/lower",
|
||||
&format!(
|
||||
"Phase 255 P2: CarrierInfo with 2 carriers (i, start), {} loop_invariants (s, sep, result)",
|
||||
loop_invariants.len()
|
||||
),
|
||||
);
|
||||
}
|
||||
// Step 3.3: header_bb - loop condition
|
||||
self.start_new_block(header_bb)?;
|
||||
|
||||
// Phase 256.8.5: Use JoinModule.entry.params as SSOT (no hardcoded ValueIds)
|
||||
use super::common::get_entry_function;
|
||||
let main_func = get_entry_function(&join_module, "pattern7")?;
|
||||
// sep_len = sep.length()
|
||||
let sep_len = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::BoxCall {
|
||||
dst: Some(sep_len),
|
||||
box_val: sep_host,
|
||||
method: "length".to_string(),
|
||||
method_id: None,
|
||||
args: vec![],
|
||||
effects: crate::mir::EffectMask::PURE.add(crate::mir::Effect::Io),
|
||||
})?;
|
||||
self.type_ctx.value_types.insert(sep_len, MirType::Integer);
|
||||
|
||||
// SSOT: Use actual params allocated by JoinIR lowerer
|
||||
let join_inputs = main_func.params.clone();
|
||||
// s_len = s.length()
|
||||
let s_len = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::BoxCall {
|
||||
dst: Some(s_len),
|
||||
box_val: s_host,
|
||||
method: "length".to_string(),
|
||||
method_id: None,
|
||||
args: vec![],
|
||||
effects: crate::mir::EffectMask::PURE.add(crate::mir::Effect::Io),
|
||||
})?;
|
||||
self.type_ctx.value_types.insert(s_len, MirType::Integer);
|
||||
|
||||
// Step 4: Build host_inputs in same order: [i, start, result, s, sep]
|
||||
// Phase 256 P1.5: Order must match main() params (line 166 in split_scan_minimal.rs): [i, start, result, s, sep]
|
||||
// CRITICAL: NOT allocation order [i(100), result(101), s(102), sep(103), start(104)]
|
||||
// But Carriers-First order: [i, start, result, s, sep] = [100, 104, 101, 102, 103]
|
||||
let host_inputs = vec![
|
||||
i_host, // i (loop var)
|
||||
start_host, // start (carrier)
|
||||
result_host, // result (carried)
|
||||
s_host, // s (invariant)
|
||||
sep_host, // sep (invariant)
|
||||
];
|
||||
// limit = s_len - sep_len
|
||||
use crate::mir::BinaryOp;
|
||||
let limit = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::BinOp {
|
||||
dst: limit,
|
||||
lhs: s_len,
|
||||
op: BinaryOp::Sub,
|
||||
rhs: sep_len,
|
||||
})?;
|
||||
self.type_ctx.value_types.insert(limit, MirType::Integer);
|
||||
|
||||
// Verify count consistency (fail-fast)
|
||||
if join_inputs.len() != host_inputs.len() {
|
||||
return Err(format!(
|
||||
"[pattern7] Params count mismatch: join_inputs={}, host_inputs={}",
|
||||
join_inputs.len(), host_inputs.len()
|
||||
));
|
||||
}
|
||||
// cond_loop = (i <= limit)
|
||||
use crate::mir::CompareOp;
|
||||
let cond_loop = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::Compare {
|
||||
dst: cond_loop,
|
||||
lhs: i_current,
|
||||
op: CompareOp::Le, // ← CompareOp::Le (user correction)
|
||||
rhs: limit,
|
||||
})?;
|
||||
self.type_ctx.value_types.insert(cond_loop, MirType::Bool);
|
||||
|
||||
// Step 5: Build exit_bindings for 2 carriers (Phase 256 P1: Required!)
|
||||
// Phase 256 P1: k_exit params are [i, start, result, s] (Carriers-First!)
|
||||
// We need exit_bindings for carriers i and start
|
||||
use crate::mir::join_ir::lowering::inline_boundary::LoopExitBinding;
|
||||
// Step 3.4: body_bb - match check
|
||||
self.start_new_block(body_bb)?;
|
||||
|
||||
let k_exit_func = join_module.require_function("k_exit", "Pattern 7");
|
||||
// k_exit params (Carriers-First order):
|
||||
// params[0] = i_exit_param
|
||||
// params[1] = start_exit_param
|
||||
// params[2] = result_exit_param
|
||||
// params[3] = s_exit_param
|
||||
// i_plus_sep = i + sep_len
|
||||
let i_plus_sep = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::BinOp {
|
||||
dst: i_plus_sep,
|
||||
lhs: i_current,
|
||||
op: BinaryOp::Add,
|
||||
rhs: sep_len,
|
||||
})?;
|
||||
self.type_ctx
|
||||
.value_types
|
||||
.insert(i_plus_sep, MirType::Integer);
|
||||
|
||||
// Get exit values for both carriers
|
||||
let join_exit_value_i = k_exit_func
|
||||
.params
|
||||
.get(0)
|
||||
.copied()
|
||||
.expect("k_exit must have parameter 0 for loop variable i");
|
||||
// chunk = s.substring(i, i_plus_sep)
|
||||
let chunk = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::BoxCall {
|
||||
dst: Some(chunk),
|
||||
box_val: s_host,
|
||||
method: "substring".to_string(),
|
||||
method_id: None,
|
||||
args: vec![i_current, i_plus_sep],
|
||||
effects: crate::mir::EffectMask::PURE.add(crate::mir::Effect::Io),
|
||||
})?;
|
||||
self.type_ctx.value_types.insert(chunk, MirType::String);
|
||||
|
||||
let join_exit_value_start = k_exit_func
|
||||
.params
|
||||
.get(1)
|
||||
.copied()
|
||||
.expect("k_exit must have parameter 1 for carrier start");
|
||||
// cond_match = (chunk == sep)
|
||||
let cond_match = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::Compare {
|
||||
dst: cond_match,
|
||||
lhs: chunk,
|
||||
op: CompareOp::Eq,
|
||||
rhs: sep_host,
|
||||
})?;
|
||||
self.type_ctx.value_types.insert(cond_match, MirType::Bool);
|
||||
|
||||
let i_exit_binding = LoopExitBinding {
|
||||
carrier_name: parts.i_var.clone(),
|
||||
join_exit_value: join_exit_value_i,
|
||||
host_slot: i_host,
|
||||
role: CarrierRole::LoopState,
|
||||
};
|
||||
// Step 3.5: then_bb - push + updates
|
||||
self.start_new_block(then_bb)?;
|
||||
|
||||
let start_exit_binding = LoopExitBinding {
|
||||
carrier_name: parts.start_var.clone(),
|
||||
join_exit_value: join_exit_value_start,
|
||||
host_slot: start_host,
|
||||
role: CarrierRole::LoopState,
|
||||
};
|
||||
// segment = s.substring(start, i)
|
||||
let segment = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::BoxCall {
|
||||
dst: Some(segment),
|
||||
box_val: s_host,
|
||||
method: "substring".to_string(),
|
||||
method_id: None,
|
||||
args: vec![start_current, i_current],
|
||||
effects: crate::mir::EffectMask::PURE.add(crate::mir::Effect::Io),
|
||||
})?;
|
||||
self.type_ctx.value_types.insert(segment, MirType::String);
|
||||
|
||||
// Phase 256 P1.5: result is modified by k_exit.push(), so it must be in exit_bindings too!
|
||||
// result is params[2] in k_exit, and we need to map its return value to result_host
|
||||
let join_exit_value_result = k_exit_func
|
||||
.params
|
||||
.get(2)
|
||||
.copied()
|
||||
.expect("k_exit must have parameter 2 for result (accumulator)");
|
||||
// result.push(segment) - Side effect!
|
||||
self.emit_instruction(MirInstruction::BoxCall {
|
||||
dst: None, // push returns Void
|
||||
box_val: result_host,
|
||||
method: "push".to_string(),
|
||||
method_id: None,
|
||||
args: vec![segment],
|
||||
effects: crate::mir::EffectMask::MUT,
|
||||
})?;
|
||||
|
||||
let result_exit_binding = LoopExitBinding {
|
||||
carrier_name: parts.result_var.clone(),
|
||||
join_exit_value: join_exit_value_result,
|
||||
host_slot: result_host,
|
||||
role: CarrierRole::LoopState, // Phase 256 P1.5: result acts like a carrier even though it's an accumulator
|
||||
};
|
||||
// start_next_then = i + sep_len (recalculated in then_bb - dominance safety, user correction)
|
||||
let start_next_then = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::BinOp {
|
||||
dst: start_next_then,
|
||||
lhs: i_current,
|
||||
op: BinaryOp::Add,
|
||||
rhs: sep_len,
|
||||
})?;
|
||||
self.type_ctx
|
||||
.value_types
|
||||
.insert(start_next_then, MirType::Integer);
|
||||
|
||||
let exit_bindings = vec![i_exit_binding, start_exit_binding, result_exit_binding];
|
||||
let i_next_then = start_next_then; // i = start (for PHI)
|
||||
|
||||
if debug {
|
||||
trace.debug(
|
||||
"pattern7/lower",
|
||||
&format!("Phase 256 P1: Generated {} exit_bindings (i, start)", exit_bindings.len()),
|
||||
);
|
||||
}
|
||||
// Step 3.6: else_bb - increment i
|
||||
self.start_new_block(else_bb)?;
|
||||
|
||||
// Step 6: Build boundary with carrier_info and loop_invariants
|
||||
// Phase 256 P1.5: Set expr_result to result_exit_param so the loop expression returns the result
|
||||
// Phase 256 P1.7: Register k_exit as continuation function for proper merging
|
||||
let boundary = JoinInlineBoundaryBuilder::new()
|
||||
.with_inputs(join_inputs, host_inputs)
|
||||
.with_loop_invariants(loop_invariants) // Phase 255 P2: Add loop invariants
|
||||
.with_exit_bindings(exit_bindings)
|
||||
.with_expr_result(Some(join_exit_value_result)) // Phase 256 P1.5: Loop expression returns result
|
||||
.with_loop_var_name(Some(parts.i_var.clone()))
|
||||
.with_carrier_info(carrier_info.clone()) // ✅ Key: carrier_info for multi-PHI
|
||||
.with_k_exit_continuation() // Phase 256 P1.7: Convenience API for k_exit registration
|
||||
.build();
|
||||
// one = const 1
|
||||
use crate::mir::ConstValue;
|
||||
let one = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::Const {
|
||||
dst: one,
|
||||
value: ConstValue::Integer(1),
|
||||
})?;
|
||||
self.type_ctx.value_types.insert(one, MirType::Integer);
|
||||
|
||||
if debug {
|
||||
trace.debug("pattern7/lower", "Built JoinInlineBoundary with carrier_info");
|
||||
}
|
||||
// i_next_else = i + 1
|
||||
let i_next_else = self.next_value_id();
|
||||
self.emit_instruction(MirInstruction::BinOp {
|
||||
dst: i_next_else,
|
||||
lhs: i_current,
|
||||
op: BinaryOp::Add,
|
||||
rhs: one,
|
||||
})?;
|
||||
self.type_ctx
|
||||
.value_types
|
||||
.insert(i_next_else, MirType::Integer);
|
||||
|
||||
// Step 7: Execute JoinIRConversionPipeline
|
||||
use super::conversion_pipeline::JoinIRConversionPipeline;
|
||||
let _ = JoinIRConversionPipeline::execute(
|
||||
let start_next_else = start_current; // Unchanged (for PHI)
|
||||
|
||||
// Step 3.7: step_bb - ensure exists
|
||||
self.ensure_block_exists(step_bb)?;
|
||||
self.ensure_block_exists(after_bb)?;
|
||||
|
||||
// Step 3.8: PHI insertion (4 PHIs) - Phase 272 P0.2 Refactoring: use emission/phi.rs
|
||||
use crate::mir::builder::emission::phi::insert_loop_phi;
|
||||
|
||||
// Header PHI 1: i_current
|
||||
insert_loop_phi(
|
||||
self,
|
||||
join_module,
|
||||
Some(&boundary),
|
||||
"pattern7",
|
||||
debug,
|
||||
header_bb,
|
||||
i_current,
|
||||
vec![(preheader_bb, i_init_val), (step_bb, i_next)],
|
||||
"pattern7/header_phi_i",
|
||||
)?;
|
||||
|
||||
if debug {
|
||||
trace.debug("pattern7/lower", "JoinIRConversionPipeline executed successfully");
|
||||
// Header PHI 2: start_current
|
||||
insert_loop_phi(
|
||||
self,
|
||||
header_bb,
|
||||
start_current,
|
||||
vec![(preheader_bb, start_init_val), (step_bb, start_next)],
|
||||
"pattern7/header_phi_start",
|
||||
)?;
|
||||
|
||||
// Step PHI 1: i_next
|
||||
insert_loop_phi(
|
||||
self,
|
||||
step_bb,
|
||||
i_next,
|
||||
vec![(then_bb, i_next_then), (else_bb, i_next_else)],
|
||||
"pattern7/step_phi_i",
|
||||
)?;
|
||||
|
||||
// Step PHI 2: start_next
|
||||
insert_loop_phi(
|
||||
self,
|
||||
step_bb,
|
||||
start_next,
|
||||
vec![(then_bb, start_next_then), (else_bb, start_next_else)],
|
||||
"pattern7/step_phi_start",
|
||||
)?;
|
||||
|
||||
// Step 3.9: Emission call
|
||||
use crate::mir::builder::emission::loop_split_scan::emit_split_scan_edgecfg;
|
||||
|
||||
if let Some(ref mut func) = self.scope_ctx.current_function {
|
||||
emit_split_scan_edgecfg(
|
||||
func,
|
||||
header_bb,
|
||||
body_bb,
|
||||
then_bb,
|
||||
else_bb,
|
||||
step_bb,
|
||||
after_bb,
|
||||
cond_loop,
|
||||
cond_match,
|
||||
)?;
|
||||
} else {
|
||||
return Err("[pattern7] No current function for emit_frag".to_string());
|
||||
}
|
||||
|
||||
// Step 8: Return result ValueId
|
||||
Ok(Some(result_host))
|
||||
if debug {
|
||||
trace.debug("pattern7/lower", "Frag emitted successfully (4 PHIs, 6 blocks)");
|
||||
}
|
||||
|
||||
// Step 3.10: Post-loop setup
|
||||
// Update variable_map (post-loop needs start for final push)
|
||||
self.variable_ctx
|
||||
.variable_map
|
||||
.insert(parts.i_var.clone(), i_current);
|
||||
self.variable_ctx
|
||||
.variable_map
|
||||
.insert(parts.start_var.clone(), start_current);
|
||||
|
||||
// Setup after_bb for subsequent AST lowering
|
||||
self.start_new_block(after_bb)?;
|
||||
|
||||
// Return Void (pattern applied successfully)
|
||||
use crate::mir::builder::emission::constant::emit_void;
|
||||
let void_val = emit_void(self);
|
||||
|
||||
Ok(Some(void_val))
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -487,26 +487,19 @@ pub(crate) fn lower(
|
||||
builder.ensure_block_exists(ret_false_bb)?;
|
||||
builder.ensure_block_exists(after_bb)?;
|
||||
|
||||
// Step 4: Insert PHI at head of header_bb with proper span synchronization
|
||||
use crate::mir::ssot::cf_common::insert_phi_at_head_spanned;
|
||||
// Step 4: Insert PHI at head of header_bb - Phase 272 P0.2 Refactoring: use emission/phi.rs
|
||||
use crate::mir::builder::emission::phi::insert_loop_phi;
|
||||
|
||||
let phi_inputs = vec![
|
||||
(preheader_bb, i_init_val), // Entry edge: initial value
|
||||
(step_bb, i_next_val), // Latch edge: updated value
|
||||
];
|
||||
|
||||
// Access current_function for PHI insertion
|
||||
if let Some(ref mut func) = builder.scope_ctx.current_function {
|
||||
insert_phi_at_head_spanned(
|
||||
func,
|
||||
header_bb,
|
||||
i_current, // PHI destination
|
||||
phi_inputs,
|
||||
builder.metadata_ctx.current_span(),
|
||||
);
|
||||
} else {
|
||||
return Err("[pattern8] No current function for PHI insertion".to_string());
|
||||
}
|
||||
insert_loop_phi(
|
||||
builder,
|
||||
header_bb,
|
||||
i_current,
|
||||
vec![
|
||||
(preheader_bb, i_init_val), // Entry edge: initial value
|
||||
(step_bb, i_next_val), // Latch edge: updated value
|
||||
],
|
||||
"pattern8/header_phi",
|
||||
)?;
|
||||
|
||||
// Step 5: Call emission entrypoint
|
||||
use crate::mir::builder::emission::loop_predicate_scan::emit_bool_predicate_scan_edgecfg;
|
||||
|
||||
@ -138,6 +138,42 @@ impl<'a> LoopPatternContext<'a> {
|
||||
/// Phase 193: Feature extraction moved to ast_feature_extractor module
|
||||
/// See: src/mir/builder/control_flow/joinir/patterns/ast_feature_extractor.rs
|
||||
|
||||
/// Phase 272 P0.2 Refactoring: can_lower() strategy classification
|
||||
///
|
||||
/// Clarifies the two main detection strategies used across patterns:
|
||||
///
|
||||
/// ## ExtractionBased (SSOT Approach)
|
||||
/// - Used by: Pattern6, Pattern7
|
||||
/// - Strategy: Try pattern extraction, if successful → match
|
||||
/// - Pros: Single source of truth (extract function defines pattern)
|
||||
/// - Cons: Extraction can be expensive (but amortized over lowering)
|
||||
///
|
||||
/// ## StructureBased (Feature Classification)
|
||||
/// - Used by: Pattern1, Pattern2, Pattern3, Pattern4, Pattern5, Pattern8, Pattern9
|
||||
/// - Strategy: Check pattern_kind (from LoopPatternContext), plus optional structural checks
|
||||
/// - Pros: Fast classification, reuses centralized feature detection
|
||||
/// - Cons: Two sources of truth (classify + structural checks)
|
||||
///
|
||||
/// ## Rationale for Dual Strategy:
|
||||
/// - Pattern6/7: Complex extraction logic (variable step, carrier tracking)
|
||||
/// → ExtractionBased avoids duplication between detect and extract
|
||||
/// - Other patterns: Simple structural features (break/continue/if-phi)
|
||||
/// → StructureBased leverages centralized LoopFeatures classification
|
||||
///
|
||||
/// This documentation prevents bugs like Phase 272 P0.2's Pattern7 issue
|
||||
/// (pattern_kind check was too restrictive, extraction-based approach fixed it).
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
#[allow(dead_code)] // Documentation purpose - not enforced in code yet
|
||||
pub(crate) enum CanLowerStrategy {
|
||||
/// Extraction-based detection: Try extract(), success → match
|
||||
/// Used by Pattern6, Pattern7
|
||||
ExtractionBased,
|
||||
|
||||
/// Structure-based detection: Check pattern_kind from LoopPatternContext
|
||||
/// Used by Pattern1, Pattern2, Pattern3, Pattern4, Pattern5, Pattern8, Pattern9
|
||||
StructureBased,
|
||||
}
|
||||
|
||||
/// Entry in the loop pattern router table.
|
||||
/// Each pattern registers a detect function and a lower function.
|
||||
pub(crate) struct LoopPatternEntry {
|
||||
|
||||
Reference in New Issue
Block a user